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Front Suspension Adjustments
(cont’d)
Adjustments for Competition 121
2. Tighten the fork center bolt lock nut (2) fully
and measure the thread length (A) as shown.
Standard: 0.6 – 0.7 in (16 – 18 mm)
Wipe the oil completely off the fork damper.
3. Install the fork damper assembly (3) to the fork
assembly (1).
4. Install the push rod (4) into the fork damper
piston rod until it stops.
5. Apply fork oil to new sealing washer (5) and
O-ring (6) and install them to the fork center
bolt (7).
Install the fork center bolt to the fork damper
piston rod. Tighten the fork center bolt fully by
hand.
6. Measure the length of the fork center bolt lock
nut (2) and fork center bolt (7) clearance.
Standard: 0.04 – 0.14 in (1.0 – 3.5 mm)
If the clearance is out of specification, check the
fork center bolt lock nut and fork center bolt
installation.
Amount of fork oil left in the fork
(without damper)
unit: US oz
(cm
3)
minute
°F/°C
5 1020355585145
32/0 0.41
(12.2)
0.37
(10.9)
0.33
(9.8)
0.32
(9.5)
0.30
(8.9)
0.28
(8.4)
0.23
(6.8)
50/10 0.37
(11.0)
0.32
(9.2)
0.29
(8.7)
0.28
(8.2)
0.25
(7.3)
0.23
(6.9)
0.19
(5.6)
68/20 0.31
(9.3)
0.27
(8.1)
0.24
(7.2)
0.22
(6.5)
0.19
(5.7)
0.17
(5.1)
0.15
(4.5)
86/30 0.29
(8.6)
0.23
(6.9)
0.20
(6.0)
0.19
(5.6)
0.17
(4.9)
0.15
(4.4)
0.11
(3.4)
(2) fork center bolt lock nut (A) thread length
14
12
10
8
6
4
2
0
0.49
0.42
0.35
0.28
0.21
0.14
0.07
(cm
3
)
(US oz)
Inverted time
32°F/0°C
50°F/10°C
68°F/20°C
86°F/30°C
Amount of fork oil
(minutes)
(2)
(A)
(1) fork assembly
(3) fork damper assembly
(4) push rod (6) O-ring (new)
(5) sealing washer (new) (7) fork center bolt
(3)
(1)
(4)
(7)
(5)
(6)
(2) fork center bolt lock nut (7) fork center bolt
(2)
(7)
0.04 – 0.14 in
(1.0 – 3.5 mm)
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